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-rw-r--r--fs/mount.h16
1 files changed, 14 insertions, 2 deletions
diff --git a/fs/mount.h b/fs/mount.h
index 4ef36d93e5a..cd500798040 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -4,8 +4,11 @@
struct mnt_namespace {
atomic_t count;
+ unsigned int proc_inum;
struct mount * root;
struct list_head list;
+ struct user_namespace *user_ns;
+ u64 seq; /* Sequence number to prevent loops */
wait_queue_head_t poll;
int event;
};
@@ -22,7 +25,6 @@ struct mount {
struct vfsmount mnt;
#ifdef CONFIG_SMP
struct mnt_pcp __percpu *mnt_pcp;
- atomic_t mnt_longterm; /* how many of the refs are longterm */
#else
int mnt_count;
int mnt_writers;
@@ -49,6 +51,8 @@ struct mount {
int mnt_ghosts;
};
+#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */
+
static inline struct mount *real_mount(struct vfsmount *mnt)
{
return container_of(mnt, struct mount, mnt);
@@ -59,6 +63,12 @@ static inline int mnt_has_parent(struct mount *mnt)
return mnt != mnt->mnt_parent;
}
+static inline int is_mounted(struct vfsmount *mnt)
+{
+ /* neither detached nor internal? */
+ return !IS_ERR_OR_NULL(real_mount(mnt));
+}
+
extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
static inline void get_mnt_ns(struct mnt_namespace *ns)
@@ -67,10 +77,12 @@ static inline void get_mnt_ns(struct mnt_namespace *ns)
}
struct proc_mounts {
- struct seq_file m; /* must be the first element */
+ struct seq_file m;
struct mnt_namespace *ns;
struct path root;
int (*show)(struct seq_file *, struct vfsmount *);
};
+#define proc_mounts(p) (container_of((p), struct proc_mounts, m))
+
extern const struct seq_operations mounts_op;